|
TLD1310EL_15 Datasheet, PDF (11/24 Pages) Infineon Technologies AG – 3 Channel High Side Current Source | |||
|
◁ |
TLD1310EL
EN Pin
5.2
Internal Supply Pin
The EN pin can be used to supply the internal logic. There are two typical application conditions, where this feature
can be used:
1) In âDC/DC control Buckâ configurations, where the voltage Vs can be below 5.5V.
2) In configurations, where a PWM signal is applied at the Vbatt pin of a light module. The buffer capacitor CBUF is
used to supply the LITIXTM Basic IC during Vbatt low (Vs low) periods. This feature can be used to minimize the
turn-on time to the values specified in Pos. 7.2.11. Otherwise, the power-on reset delay time tPOR (Pos. 5.4.4) has
to be considered.
The capacitor can be calculated using the following formula:
CBUF
=
tLOW(max)
â
-----------------I--E---N----(--L---S---)----------------
VS â VD1 â VS(POR)
(1)
See also a typical application drawing in Chapter 8.
VBATT
D1
CBUF
VS
Internal
supply
EN
Thermal
protection
Output
control
RSET
IN_SET Current
adjust
BasLicITILXETMDBaDsirciver
OUT3
OUT2
OUT1
GND
GND
Figure 5 External circuit when applying a fast PWM signal on VBATT
Data Sheet
11
Rev. 1.1, 2015-03-19
|
▷ |